Troubleshooting
If you are experiencing trouble, refer to the information in this section. Before troubleshooting, confirm all
connections (see "Connections (Page 147)") and confirm that the PoE (Power over Ethernet) device or power
outlet to which the KX-NT400 is connected to is receiving power.
Common Issues and Solutions
General Use
Issue
Possible Cause & Solution Reference
The display is blank.
• The KX-NT400 is not receiving power.
→ The KX-NT400 is not designed to function when there is
a power failure. Make sure that the device supplying PoE
is receiving power and that the Ethernet cable is properly
connected. If an AC adaptor is connected, confirm that the
AC adaptor is connected and receiving power.
Page 147
The display is not shown
well.
• The LCD’s brightness is too low.
→ Adjust the LCD’s brightness.
Page 113
The KX-NT400 is not
performing properly.
• Cables or cords are not connected properly.
→ Check all connections.
Page 147
• Your connection settings are incorrect.
→ Consult your administrator to confirm that your settings are
correct.
→ If the problem persists, consult your dealer.
Page 157
• An error has occurred.
→ Reset the KX-NT400. When using PoE, disconnect the
Ethernet cable, wait 10 seconds, and then connect the
Ethernet cable again. If using an AC adaptor, disconnect
the AC adaptor from the power outlet, wait 10 seconds,
and then connect the AC adaptor again.
Page 168
I cannot press the buttons
on the screen.
• The screen was not calibrated properly.
→ Perform calibration again. You can perform the calibration
from the Display Settings screen.
Page 113
I cannot cancel the
Application lock even
when I enter the correct
password.
• Your extension has been locked by the PBX.
→ To unlock your extension, the PIN and PIN lock for your
extension must be cleared. For details, consult your
manager.
—
The KX-NT400 does not
respond when buttons are
pressed.
• The extension dial lock is set.
→ Unlock the KX-NT400.
Page 97
• The KX-NT400 is connected to an eXtra Device Port.
→ System programming is required. Consult your dealer.
—
Document Version 2010-01 Operating Instructions 183
Appendix
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